[automerger skipped] Add BugreportManagerTestCases to bugreport presubmit am: 59a1d2b4aa am: b07a5734df am: 8fa94f4abe am: e831bc830e -s ours

am skip reason: Change-Id Ib6ec81570d5000ae3c7cb76da0e8e0eed98c425e with SHA-1 f7f4f62850 is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1440640

Change-Id: Id4f707ba6ffd4d5a684d5a2a05219a023818d69d